hardcode backup timeout to 10s

restic/wrapper.go

@@ -165,7 +165,7 @@ func (w *Wrapper) Backup(c *Config) error {
 	select {
 	case <-busy:
 		busy = nil // It's alive! continue with cmd.Wait()
-	case <-time.After(3 * time.Second):
+	case <-time.After(10 * time.Second):
 		killErr := cmd.Process.Kill()
 		return fmt.Errorf("backup output timeout, repository server down?: %w", killErr)
 	}